A series of two-dimensional triphenylamine (TPA)-substituted quinoxaline-based D-A-type polymers, in which the electron-donating indacenodithiophene unit was linked to the TPA-substituted electron-accepting quinoxaline derivatives, were synthesized. Fluorine, which exhibits a strong electron-withdrawing nature, was systematically incorporated into the structure of the polymers and its effect on the properties of the polymers was investigated. Three target polymers, namely, PIQx-TOF, PIQx-TIF, and PIQx-T2F were synthesized. The Arabic numerals in the names of the polymers indicate the number of fluorine atoms at the 6,7-positions of the triphenylamine-substituted quinoxaline units in the polymers. The structural, optical, and electrochemical characteristics of the polymers were investigated. The PCE of the polymer solar cells with the inverted-type configuration based on the mono-fluorinated polymer, PIQx-TIF, was the highest (5.30%) followed by those of the devices based on PIQx-TOF (4.49%) and the di-fluorinated polymer, PIQx-T2F (4.65%). This enhanced photovoltaic performance of the device with the polymer with a single fluorine atom can be attributed to the increase in the hole mobility, charge generation and dissociation, molecular ordering, and suppression of unfavorable recombination kinetics. Therefore, the incorporation of a single fluorine atom is the optimal condition for the synthesis of TPA-substituted quinoxaline-based polymers for photovoltaic applications.

合成了一系列二维三苯胺（TPA）取代的喹喔啉类DA型聚合物，其中供电子的茚并二噻吩单元与TPA取代的电子接受性喹喔啉衍生物相连。表现出强吸电子性质的氟被系统地结合到聚合物的结构中，并研究了其对聚合物性能的影响。三种目标聚合物，即PIQx-TOF，PIQx-TIF和PIQx-T2F被合成。聚合物名称中的阿拉伯数字表示聚合物中三苯胺取代的喹喔啉单元的6,7-位的氟原子数。研究了聚合物的结构，光学和电化学特性。基于单氟化聚合物PIQx-TIF的具有倒置型结构的聚合物太阳能电池的PCE最高（5.30％），其次是基于PIQx-TOF的器件的PCE（4.49％）和di氟化聚合物PIQx-T2F（4.65％）。具有具有单个氟原子的聚合物的器件的这种增强的光伏性能可以归因于空穴迁移率的增加，电荷的产生和解离，分子有序化以及对不利的重组动力学的抑制。因此，引入单个氟原子是合成用于光伏应用的TPA取代的喹喔啉类聚合物的最佳条件。